Skate roll



SKATE ROLL Filed Jan. 8. 1929 VPlasma July 14, 1931 UNITED STATES JAMES E. IIABSHALL, F NEW HAVEN, CONNECTICUT, ASSIGNOR, BY MESNE ASSIGN- IENTS, T0 'WINGHESTER BEPEATING ARMS COMPANY, OF NEW HAVEN, CONNECTI- CUT, A CORPORATION 0F DELAWARE SKATE ROLL Application mea January s, 1929. semi m. ssm.

This invention relates to skate rolls, and more particularly to skate rolls of the ball bearin type wherein a tread and bearing cage o hard metal are employed in conjunc- `6 tion with a web of softer metal.

In the usual-construction of skate rolls the bearin are arranged surrounding a center cone w ich receives the axle and a bearing cage of hard metal is arranged over the bearin and carried by the web of the roll. The we may advantageously be formed of soft metal and is shaped to receive the bearing ca e. To prevent relative movement of the we and bearing cage I preferably form a 1B number of projections on the exterior of the bearing cage and as the bearing cage fits snu ly in a. recess provided for it in the web of ne roll, these projections will embed in the soft metal of the web and thus prevent l relative turning of the bearing cage andweb of the roll.

To permit assembly of the roll the web is preferably formed of two sections, one of which is provided with a series of indentations and after the two sections of the web have been assembled with the cone, bearings and bearing cages, I connect them at these indentations by spot welding. The rovision of the indentations localizes the e ect of the electric current and permits the sections of the web to be more readily welded to each other.

The two sections of the web are then inserted in atread of hard metal and this tread is provided with a flange at one side which engages the web llange to position the inner case within the tread. The circumferential edge of the other web flange is bevelled and after the case is in position the corresponding edge of the tread, which is also bevelled, is spun over the adjacent flange of the web so that the metal flows to the inside tread and Bows over the bevelled edge of the web.

In the accompanying drawings,

Fig. 1 is a central sectional view of a roll partially assembled;

Fig. 2 is a similar view after the assembly has been completed with the case inside the tread and the edge of the tread spun over the flange of the web;

1lig. 3 is a side elevation of the assembled ro Fig. 4 is a similar view of one of the bearingrcages; and,

ig. 5 is a detailed, sectional view thereof.

Referring to the drawings, the reference numeral 1 designatesthe usual cone member which consists of a metallic cylinder having a central bore 2 and having its intermediate portion increased in diameter as at 3 to form a air of race-ways 4. Ball bearings 5 are a apted to be received in these race-ways. The ball bearings are retained in position by bearing cages 6, one of which is shown in `detail in Figs. 4 and 5 of the drawings.

The bearing cages are suitably shaped to fit around the bearings and are preferably formed of hard metal to revent wear. These bearing cages are provi ed with a plurality of radial projections 7 on their outer surfaces as shown 1n Figs. 4 and 5 of the clrawin s.

The caring cages are adapted to be received in web sections 8. As shown, the web sections consist of disc ortions 9 and peripheral flanges 10. Adjacent the center of the web it is shaped as at 11 to receive a bearing caffe and is provided with a central opening of slightly greater diameter than the cone member 1. The webs are made of relatively soft metal and when the bearing cages, which litsnugly in the recesses or cups 11, are inserted the projections 7 embed themselves in the metal of the web section and are thus firmly held against relative rotation. As shown, one of the web sections is provided with a plurality of indentations 12 whereby the web sections may be welded to each other by spot welding as indicated at 13 in Fig. 2 of the drawings. The inner case consisting of the cone, bearings bearing cages and web sections is ada ted to be inserted in a tread member whic is made of relatively hard metal to withstand wear and which is substantially cylindrical in theform of a ring of proper diameter to snu ly receive the case. As shown in Fig. 1 o the drawings, the case is inserted in the tread 14 from one side and the op osite side of the tread is provided with a ange 15 which is adapted to limit the inward movement of the case. When the inner case occupies the position shown in Fig. 2 of the drawings, the roll is ready for the inal operation which is adapted to lock the inner case to the tread to prevent relative rotation. As shown, one of the web flanges 10 is provided with a bevelled edge 16 and the adjacent edge of the tread is bevelled as at 17. When the inner case is in its proper position within the tread member 14, the bevelled edge 17 is adapted to be spun inwardly over the bevelled edge 16 of the web ange, as indicated at 18 in Fig. 2 of the drawings to lock'the inner case to the web.

In assembling the roll the bearing cups are first inserted in the webs and theweb without the indentationsy is inserted in the tread to the position shown in Fig. 1 of the drawings. The set of bearings to the left in Fig. 1 of the drawings and the cone are then seated, the other set of bearings are then arranged in position and the other web section placed over the cone and bearings to complete the assembly of the inner case. The case is then forced downwardly in the tread until the lower web section enages the flange 15. The two webs are then used to each other at the points of the indentations 12 by means of spot welding which localizes t e effect of the electric current and Welds the websections to each other as indicated at 13 in Fig. 2 of the drawin s. The bevelled edge on the outside of t e tread is then spun over the bevelled edge 16 of the adjacent web section as indicated at 18 in Fig. 2 of the drawings to lock the inner case to the tread.

One of the chief diiliculties and causes of trouble in the use of skate rolls is the loosening of the tread from the inner case. The plrovision of the bevelled edge 16 on one of t e web flanges and the spinning of the metal of the tread over this bevelled edge will eiectually prevent this trouble. Furthermore, the spaced t welding of the web sections to each ot er at the points 13, intermediate the center of the roll and its periphery, causes the outer flanges of the webs to tend to spring away from each other when pressure is placed on the roll which creates pressure against the folded edge 18 of the outside tread. This pressure together with irregularities in the surface of the bevelled edge 16 will lock the case of the tread and prevent the outside tread from slipping when the roll is turned.

By way of illustration the invention has been described in connection with skate rolls, but it Will be apparent that its utility is not limited to this art. It may be employed, for instance, in the construction of castor rolls, particularly when adapted to be used on various types of trucks which are submitted to rough usage and on which the wear is proportionately great. It may also be employed on other rolls of various types.

Iclaim: l

1. A skate roll comprisin a bearing c e and a web, the web being s aped to snug y receive the bearing ca e, the web being formed of softer meta than the bearing cage, the exterior of the bearing cage being provided with extensions adapted to embe in the softer metal of the web.

2. A skate rollcom risin a pair of web sections and a tread, t e we sections being provided with circumferential anges ada ted to be received in the tread, the edge of one of said web anges bein bevelled, the` adjacent portion of the tread ing spun over said bevelled edge, said web sections being s ot welded to each other at" points space from said flanges whereby pressure on said roll will tend to spread said flanges and cause said bevelled edge to lock said tread against relative movement.

3. A skate rollcomprising an inner case consisting of a cone forming a air of raceways, bearin s arranged in sai race-ways a pair of we sections having cups formed therein, bearing cages fitting snu l in said cups and adapted to receive sai arings, said bearing cages being rovided with external rojections ada te to embed in the wall o said cups, sai web sections havin disc-like portions adapted to be arran ed beside each other and welded to each ot er at intervals, said web sections being provided with circumferential iianges, and a tread member snugly receiving said inner case, said tread member having a flange at one side adapted to engage the outer edge of one of the web anges to position the inner case in the tread member, the outer edge of the other web flange being bevelled, and the adjacent edge gf the tread member being spun over thebevelled edge of said web an e.

4 gA skate roll comprising an inner case consisting of a cone'forming a pair oflraceways, bearin arranged in said race-ways, a pair of we sections having cups formed therein, bearing cages fitting snu l in said cu and ada ted to receive sait?` bearings, said web sections havi disc-like ortions adapted to be arra beside eac other and welded to each other at intervals, seid web sections being rovided with crcum-` ferential flanges, an a. tread member snug- 1y receiving said inner case, said tread mem ber having a ange at one side ada ted to engage the outer edge of one of t e web flanges to osition the inner case in the tread member, t e outer edge of the other web aange being bevelled and the adjac'ent ed e of the tread member bein spun over t e bevelled edge of said web an In testimony whereof I a. my signature.

J AMES E. MARSHALL.

and welded to each other at intervals, said web sections being rovided with circumferential flanges, an a tread member snug- 1y receiving said inner case, said tread mem- 5 ber having a flange at one side adapted to engage the outex` edge of' one of the web flanges to ostion the inner case in the tread member, t e outer edge of the other web ian e being bevelled and lthe adjacent edge of t e tread member bein spun over t e bevelled edge of said web an e.

In testimony whereof I a my signature.

JAMES E. MARSHALL.

CERTIFICATE or CoRnECTioN.

Patent No. 1,813,944. y Gramm July 14, 1931, 1Q

JAMES E. MARSHALL.

lt is hereby" certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 83, claim l, before the word "web" second occurrence insert the words central portion of the; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 29th day of September, A. D. 1931.

M. J. Moore, (Seel) Acting Commissioner of Patents.

CERTIFICATE OF CORRECTION.

Patent No. 1,813,944. Granted July I4, 1931, to

JAMES E. MARSHALL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, line 83, claim l, before the word "web" second occurrence insert the words central portion of the; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 29th day of September, A. D. 1931.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

